Improved apparatus for distilling petroleum



A. MILLOCHAU.

Apparatusofor Distillng Petroleum.

No.l 46,923. 'Patented March 21, 1865.

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N, PETERS. Phammhogmphur, wuniu'nm. I74 C.

NiTnD TATES ADOLPH MILLOCHAU, OF NEV YORK, N. Y.

Specification forming part of Letters Patent No. 116,923, dated March 21, 1865.

To all whom it may concern:

Be it known that I, ADOLPH MILLocHaU, of the city and State of New York, have invented, made, and applied to use a certain new and useful Improvement in the Distillation of Petroleum and other Oily Substances; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawing, making part of this specification, in which I have represented a vertical section of the apparatus employed by me.

My invention relates to a double distillation in a double still for combining and utilizing the heavy and light products of the distillation of petroleum or similar oils and producing an oil of a medium gravity adapted to burning.

In the drawing, a is a still heated by re in a furnace, b. c is a second still, introduced within and heated by the still a. I have represented these stills in the form of concentric cylinders, the inner one passing through the cover of the outer one, as they are easily made in this form. They may, however, be tted in any other convenient manner, So that the inner still shall be heated by the outer one and the vapors be conveyed away, and the products of condensation returned, as hereinafter specified.

d is a pipe conveying the vapors from the still a through the condenser e, and f is apipe from the still c, also passing through the condenser e.

The mode of using my apparatus and performing the distilling operation is as follows: I introduce in the still ct a suitable amount of crude petroleum and proceed to its distillation, having first introduced in the still c the tar-residuum or heavy oil remainingl from a previous or ordinary distillation. I find that about two per cent. (2%) of gas and water will be driven off, which I allow to escape from the end ofthe still-worm d. When the light oil, benzine, or naphtha comes over, Ireceive the same from the spout g into thc vessel h, and pass it through the pipe t' into the small still c, and this I continue until a burning-oil of about 65o Baume passes over from the still a, and this burning-oilI convey from the end of d into any suitable receptacle until the whole of the oil adapted to burning purposes is distilled from a, as the oil which may come over of a gravity of 40 and less is not adapted to burning. The oil that is distilled after the burning-oil ceases to ow is returned by the spout g and vessel h to the smaller still c through the pipet' for a second charge to the still c. Vhile the distillation before named is progressing from the still a, the heat thereof causes evaporation in the still c. The benzine and other light oils that have been evaporated from the still a and supplied to the still c combine with the heavy oils with which the still was charged and pass through the condenser-worm f, and are again returned to the still c through h and t until the oil pass ing away becomes of the gravity (60 Baume) required for commencing the distillation of burning-oil. This product is then conveyed to a suitable receptacle, and this distillation of burning-oil may be continued while the heavy oil distilled from apasses back through h and 'i to the small still c, the burning-oil from the wormf being conveyed away by a `spout instead of passing into the receptacle h.

I have shown a receptacle, k, and pipe Z, by

which the distillation from the still a can be the tar-residuum in said still near the end of the distillatien and form a heavy oil, that is passed back into the still c to be used with the next charge of petroleum to the still a,- or in some cases a burning-oil will continue to pass away from the still a if naphtha or benzine is introduced with the tar-residuum in the last portions of the process.

This still may be used in the following mauner, if desired: Introduce crude oil into the larger still, distill the same, and return the product into itself until a quality of oil suitable for burning is produced; then turn the said products ot' condensation from the large still into the smaller or inner still and let the operation proceed, drawing away the burning-oil distilled from the smaller still. There will at the end of the operation be but little residuuni in the large still, and the heavy oil Y oil.

that is left in the small still may be run into leum and similar oils, substantially as specithe large still with the fresh charge of crude ied.

In Witness whereof I have hereunto set my What I claim, and desire to secure by Letsignature this 26th day of January, 1865.

ters Patent, is A. MILLOCHAU.

The distillation of heavy and light oils Witnesses: jointly to produce a burning-oil by means of LEMUEL W'. SERRELL,

a second still Within the main still for petro- GHAs. H. SMITH. 

